AT91SAM9261-CJ-999 Atmel, AT91SAM9261-CJ-999 Datasheet - Page 247
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AT91SAM9261-CJ-999
Manufacturer Part Number
AT91SAM9261-CJ-999
Description
IC MCU ARM9 ULTRA LP 217LFBGA
Manufacturer
Atmel
Series
AT91SAMr
Datasheet
1.AT91SAM9261-CJ-999.pdf
(749 pages)
Specifications of AT91SAM9261-CJ-999
Core Processor
ARM9
Core Size
16/32-Bit
Speed
190MHz
Connectivity
EBI/EMI, I²C, MMC, SPI, SSC, UART/USART, USB
Peripherals
DMA, LCD, POR, PWM, WDT
Number Of I /o
96
Program Memory Size
32KB (32K x 8)
Program Memory Type
ROM
Ram Size
192K x 8
Voltage - Supply (vcc/vdd)
1.08 V ~ 1.32 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
217-LFBGA
For Use With
AT91SAM9261-EK - KIT EVAL FOR AT91SAM926EJ-SAT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
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Part Number
Manufacturer
Quantity
Price
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25.8
25.8.1
6062M–ATARM–23-Mar-09
Clock Switching Details
Master Clock Switching Timings
Table 25-1
from one selected clock to another one. This is in the event that the prescaler is de-activated.
When the prescaler is activated, an additional time of 64 clock cycles of the new selected clock
has to be added.
Table 25-1.
Notes:
Table 25-2.
To
Main Clock
SLCK
PLL Clock
To
PLLA Clock
PLLB Clock
1. PLL designates either the PLL A or the PLL B Clock.
2. PLLCOUNT designates either PLLACOUNT or PLLBCOUNT.
From
and
From
Clock Switching Timings (Worst Case)
Clock Switching Timings Between Two PLLs (Worst Case)
Table 25-2
PLLCOUNT x SLCK +
0.5 x Main Clock +
0.5 x Main Clock +
2.5 x PLLx Clock
Main Clock
4.5 x SLCK
4 x SLCK +
give the worst case timings required for the Master Clock to switch
PLLACOUNT x SLCK
–
2.5 x PLLA Clock +
3 x PLLB Clock +
1.5 x PLLB Clock
PLLA Clock
4 x SLCK +
4 x SLCK +
AT91SAM9261 Preliminary
PLLCOUNT x SLCK
2.5 x PLL Clock +
2.5 x Main Clock
4 x SLCK +
5 x SLCK +
SLCK
–
PLLBCOUNT x SLCK
2.5 x PLLB Clock +
3 x PLLA Clock +
1.5 x PLLA Clock
PLLB Clock
4 x SLCK +
4 x SLCK +
PLLCOUNT x SLCK
2.5 x PLL Clock +
3 x PLL Clock +
3 x PLL Clock +
1 x Main Clock
4 x SLCK +
4 x SLCK +
PLL Clock
5 x SLCK
247
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